Covering for ladle stopper-rods



'(No Model) W; H. HAWS.

' OOVER ING FOR-LADLE STOPPER RODS. No. 280,618. PatentedaJuly 3, 1883..

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ATTORNEYS N. PETERS. Phnlo-Lvlhographer. Wnhi nnnnnn C4 UNITED STATES PATENT OFFICE.

WILLIAM H. HAWS, or JOHNSTOWN, PENNSYLVANIA.

COVERING FOR LADLE STOPPER-R'ODS.

SPECIFICATION forming part of Letters Patent No. 280,618, dated July 3, 1883.

' Application filed March 10, 1883. (N model.)

To all whom it may concern.-

Be it known that I, WM. H. HAWS, a citizen of the-United States, and a resident'of Johnstown, in the county of Oambria and State of Pennsylvania, have invented certain new and useful Improvements in Coverings for Ladle Stopper-Rods; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled 4L and 5 are perspective views.

The object of this invention is to provide a sectional covering of improved character for the stopper-rods of furnace-ladles; and the in-. vention consists in the construction and novel arrangement in one end of each sleeve-section of an annular V-shaped groove, the outer wall of which is concave in'form, while both walls rise to about the same level, and-at the other end of the section an annular V-shaped rib, the outer wall of which is convex, and interior and exterior concentric shoulders extending, respectively, from the base of the rib to the central aperture of the sleeve, and from said base to the external wall thereof, all as hereinafter set forth.

In the accompanying drawings, the letter a designates the rod or handle of the ladle-stopper b. This rod or handle is covered by slipping upon it the sleeve-sections c c, which are designed to engage by their ends the series extending above the surface of the molten metal in the ladle, and being designed to protect the rod from the action of the heated metal.

Heretofore sleeve-sections of fire-clay have been employed to form coverings for the stop-- per-rods; but such sleeve-sections have been made with a single central projection around the aperture at one end, and a single corresponding central depression of corresponding form and size around the aperture at the other end, and it has been found that the molten metal will find its way through the joint .between the sections to the rod.

The sectionscc of the covering which I have invented are of improved form, and are designed, when put together on the rod, to prevent the access of the molten metal thereto. To this end each sleeve-section has formed in one end an annular groove, 6, of V shape, the.

outer wall of which is concave in form, and separated-from the aperture (1 of the section by a thick interior wall, and from the outer surface, It, ofthe section by a thick exterior wall, Z, these walls rising to equal or nearly equal height. 011 the other end of the sleevesection is formed an annular V-shaped rib, 7c, the outer wall of which is convex and corresponding in shape and size to the groove e, and adapted to closely fit a groove of similar char acter formed in the end of the adjacent sleevesection. From the base of the rib k inward to the aperture of the sleeve-section extends an interior shoulder, m, and from said base outward extends an exterior shoulder, a, and said shoulders are designed to abut against the raised edges of the inner and outer walls, respectively, of the annular groove of the adjacent sleeve-section. In putting these sections, which are made of fire-clay or other refractory material, upon the stopper-rod, a little thinlymixed fire-clay is poured in the annular groove of each section, and the next section is brought down upon it, making a complete and tight joint. Even should the liquid metal enter the exterior portion of the joint before it could pass down the outer wall of the groove and up the inner wall thereof, it would chill, so that the rod would not be reached.

The walls of converters and other furnaces have been constructed in segmental sections that is to say, the layers of which the walls are formed have been composed of segmental sections so laid as to break j ointsand these sections have been provided with a concavity in the under face, and ahead to fit the concavity in the next layer above 011 the upper face. These are, however, sectional layers, and do not subserve the purpose designed to be attained by my construction, and are not applicable to ladle stopper-rods. Each section in my construction is complete in itself, and is composed of a single piece so constructed that when the sections are connected as before de scribed, the molten metal cannot, reach the rod or handle.

formed with the Vsl1apcd annular grl'iove 1', concave on its outer wall, and corresponding annular V-shaped rib, 1.7, convex on its outer wall, substantially as and for the purposes specified.

In testimony whereof I al'iix my signature in presence of two witnesses.

\VIIJLDUI l-I. HLUVS.

Vitnesses:

Lewis EPILE'Y, HALrIr A. BYRON. 

